Edge Angles - If this is selected the Angle in degrees will be drawn near the corner of two selected edges. The edges must be connected to the same corner.

边角度：如果开启，将以角度在两个选择边的夹角显示该角的角度，边必须被连接形成一个角。

youdao

To avoid harsh edges, I chose the "Eraser Tool", selected a soft brush, and lowered the opacity of the brush just under 50%.

为了避免粗糙的边缘，我选择了“橡皮擦工具”，选择了一个柔软的刷子，并且将不透明度降低到略低于50%。

youdao

The first is that animals in the middle have more neighbours than those at the edges, and this greater number reduces the chance of a particular individual being selected by a predator.

ECONOMIST: Animal behaviour